Pipe mold



Jan, 16, E923.

2 SHEETS-SHEET 2 Patented dan. i6, i923.

JOHN CALLXSTER LYMAN, OF SALT LAKE CTY, UTAH.

PIPE MOLD.

Application led August 5, 192i.

To all whom t may concern:

`Be it known that l, JOHN CALmsrnn LY- nAN, a citizen oif the United States, residing at Salt Lake City, in the county of Salt Lake and State of Utah, have invented certain new and useful'lmprovements in Pipe Molds; and l do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled inthe art to which it appertains to make and use the same. n

My invention relates to improvements in pipe molds vand more-particularly to those for continuously casting and laying cement pipe lines in o-r on the earth, by first torming the lower halt of the pipe and then completing the same after the lower half has set to the necessary extent.

An improved form of contractible sectional core is used incasting the upper haltv stretch of the pipe.

Each core is preferably formed of an arched sheet of metal, and a further object of the invention is to provide improved means for re-inforcing the edges of the metal sheet and for attaching the contracting means thereto.

With the foregoing in View, the invention resides in the novel subject matter described and claimed, the descriptive matter being supplemented by the accompanying drawings.

Figures l and 2 are respectively a top plan view and an end elevation showing the manner of forming the lower half of the pipe.

Figure 3 is a perspective view of the shaping mold shown in Figs. 1 and 2.

Figure 4 is an end elevation showing one of the core sections in use to `:form the upper half of the pipe. Y

Figure 5 isa duplicate of Fig. 4 with the exception that it illustrates the core section in contracted position, ready for withdrawal.

Figure 6 is a horizontal sectional view ating bars ofthe core sections together.

Serial No. 490,1 i9.

Figure 7 is a duplicate of Fig. 6 with the exception that it illustrates the core in con tracted position.

Figure 8 is a detail elevation of the coacting coupling members which are eni-J `ployed on the operating bars oi. the core 'of the mold member so as to re-iniorce the same. A stretch of the lowerpipehali l is formed of any desired length, for instance, one hundred feet or more, and when it has set sufficiently, the upper half, 1a of the pipe is formed thereon as indicated in Figs. 4 and 5, a novel Jform of core being used in casting said upper half la. This core consists of a plurality of sections 5, each of which is preferably formed from a single arched piece of metal with its lower edges turned inwardly and upwardly to provide longitudinal channels 6. Reinforcing bars 7 are suitably secured in these channels and the expanding and contracting means of each core section is connected with said bars. This means is shown in the form of toggle links 8 pivotally connected with a longitudinal operating bar 9, one of these bars being located in each of the core sections 5', so that by shifting the bar in one direction7 the links 8 are operated to expand the core. while movement of said bar in the opposite direction will contract the device. To limit the expanding movement of the links 8 they are by preference provided with stops l0 receivable in notches 11 and the links may, if desired, be provided with openings l2 to receive a locking pin if it is advisable to secure said links in the position shown in Fig. 6. In most instances, however, this pin is not used since it would interfere with simultaneous contraction of a plurality of the core sections.

@ne end of each bar 9 is provided with a coupling member of the form indicated at 13 in Fig. 8 or of the type disclosed at 13 in Fig. 9. The other end of each bar 9 is i0 rality of the core sections 5 have been used in completing the casting operation on length of pipe. a pull on the bar 9 ot' the last used section will simultaneously move all ot' the operating bars 9 to core-contracting position, thereby simultaneously placing all of the core sec-tions in condition tor withdrawal from the completed pipe. The cou-l pling members also serve to detachably con nect the several core sections 5 so that by pulling upon one, the others may be Withdrawn.

From the foregoing, taken in "connection with the acconuoanying drawings, it Will be seen that avery novel molding; apparatus has been devised for accomplishing the object y of the invention and attention is directed to the fact that longJ .stretches of cement pipe may be easilyand rapidly molded by the use of my improveddevice.

claim:

l. A pipe molding core comprising a plurality oi contractible core sect-ions adapted to be disposed endto end, means within said core sections for contracting the same, including longitudinal operating bars in said core sections respectively, and coupling members on the ends of each ot' said operating bars, one coupling member of each bar being self-engageable with the `other coupling member ot the bar of the next adjacent `core section `when one section is forced into abutting relation with another, Whereby all ot' said core sections may bel simultaneously contracted after molding the pipe upon the same.

2. A p'ipe molding' core comprising; an arc-hed sheet of metal having its edges turned inwardly and upwardly and forming channels a pair of bars mounted in said channels, and means extending between said `bars for expanding and contracting` the core. v In testimony whereof I have hereunto set my hand. l

JOHN CALLISTER LYMAN. Witnesses:

A. CALDER MACKAY, RALPH T. STEWART. 

